Manganese
Harpeth Valley Utility District
Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.
9
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 1.71 ppb | 4 | 1 | ND - 6.84 ppb |
| 2019 | 0.660 ppb | 2 | 1 | ND - 1.32 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 10.5 ppb | 1 | 1 | 10.5 ppb |
| 2022 | 10.5 ppb | 1 | 1 | 10.5 ppb |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 100 ppb
The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2018-06-15 | ND |
| 2018-09-11 | ND |
| 2018-11-09 | ND |
| 2018-12-14 | 6.84 ppb |
| 2019-03-12 | 1.32 ppb |
| 2019-11-12 | ND |
| 2021-11-08 | 10.5 ppb |
| 2022-11-07 | 10.5 ppb |
| 2023-11-16 | ND |